A shearing machine for metal sheets

Abstract

This utility model discloses a metal sheet shearing machine, belonging to the technical field of shearing machines. The metal sheet shearing machine includes a worktable. A positioning mechanism and an auxiliary pressing assembly are provided on the top surface of the worktable. A shearing mechanism is also provided on the front side of the worktable. The auxiliary pressing assembly includes a drive frame fixed to the top surface of the worktable. An eccentric pressing shaft is rotatably connected to the top surface of the drive frame. Several pressing rods are slidably inserted into the bottom surface of the drive frame. The top end of each pressing rod abuts against the outer wall of the eccentric pressing shaft, and a directional pressing roller is rotatably connected to the bottom end of the pressing rod. This utility model improves the positioning stability during the metal sheet shearing process through a dual-point support design of the directional pressing roller and the pressing shaft. The directional pressing roller pre-presses the front end during the sheet feeding stage, and works in conjunction with the pressing shaft of the shearing mechanism to press the middle in real time, forming a synergistic constraint along the feeding direction, effectively avoiding the problem of the front end of long sheets warping due to their own weight or thrust.

Description

Technical Field

[0001] This utility model belongs to the field of shearing machine technology, specifically relating to a shearing machine for metal sheets. Background Technology

[0002] Metal sheets, as a fundamental material in industrial manufacturing, are widely used in industries such as the manufacture of mechanical parts and equipment housings. Their processing precision directly affects the quality of the final product. Shearing machines, as key equipment in metal sheet forming and processing, achieve fixed-length and fixed-width shearing of sheets through the relative movement of cutting tools. They are core equipment for realizing large-scale and standardized sheet processing and play an irreplaceable role in fields such as machinery manufacturing, metallurgy, and light industry.

[0003] The typical workflow of a small shearing machine is as follows: The operator moves the metal sheet to be sheared to the worktable, manually pushes the sheet to align the edge to be sheared with the positioning baffle, and then drives the pressing mechanism to descend by rotating the handwheel or turning the lever to press and fix the sheet; then the operator steps on the foot switch or pulls the shearing handle to drive the upper blade to move downward along the guide rail, cooperating with the lower blade to complete the sheet cutting; after shearing, the operator manually lifts the pressing mechanism, removes the sheared sheet, and repeats the above steps for the next processing.

[0004] However, during the process of feeding the metal sheet into the shearing machine, since the shearing machine's pressing and positioning mechanism is located on the shearing blade holder, the pressing and positioning mechanism will only press and position the metal sheet when the shearing blade holder presses down to cut. Before that, it is necessary to manually keep the metal sheet parallel to the worktable. If the metal sheet is tilted, it will lead to inaccurate cutting length. Especially for long plates, the front end is very easy to curl up due to its own weight, causing the metal sheet to tilt and affecting the cutting accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a shearing machine for metal sheets.

[0006] The technical solution adopted to solve the above technical problems is as follows: a shearing machine for metal sheets is provided, including a worktable, characterized in that a positioning mechanism and an auxiliary pressing assembly are provided on the top surface of the worktable, and a shearing mechanism is also provided on the front side of the worktable. The auxiliary pressing assembly includes a drive frame fixed on the top surface of the worktable, an eccentric pressing shaft is rotatably connected to the top surface of the drive frame, and a plurality of pressing rods are slidably inserted on the bottom surface of the drive frame. The top end of the pressing rod abuts against the outer wall of the eccentric pressing shaft, and a directional pressing wheel is rotatably connected to the bottom end of the pressing rod. The shearing mechanism includes a lifting seat provided on the front side of the worktable, a cutter is fixed on the bottom surface of the lifting seat near the rear side, and a plurality of pressing shafts are slidably inserted on the top surface of the lifting seat.

[0007] The above technical solution improves the positioning stability of metal sheet shearing by using a dual-point support design of directional pressure roller and pressure shaft. The directional pressure roller pre-presses the front end during the sheet feeding stage, and the pressure shaft of the shearing mechanism presses the middle in real time, forming a coordinated constraint along the feeding direction, which effectively avoids the problem of the front end of long sheet lifting due to its own weight or thrust.

[0008] Furthermore, a tension spring is fixed between the top surface of the directional pressure roller and the bottom surface of the drive frame. The tension spring is movably sleeved on the outer wall of the pressure rod, and operating rods are fixed at both ends of the eccentric pressure shaft.

[0009] With the above technical solution, the top of the directional pressure roller is elastically connected to the drive frame via a tension spring. When the eccentric pressure shaft rotates and drives the directional roller to descend, the tension spring adapts to the preload, so that when the eccentric pressure shaft resets, the tension spring quickly rebounds and drives the directional roller to reset, which facilitates the positioning of the next plate.

[0010] Furthermore, the positioning mechanism includes a positioning groove formed on the top surface of the workbench, with several side positioning wheels rotatably connected to the left and right sides of the inside of the positioning groove, and a support plate detachably installed on the bottom surface of the inside of the positioning groove by bolts, with a bottom positioning wheel rotatably connected to the top surface of the support plate.

[0011] The above technical solution forms a rolling guide structure by incorporating a side positioning wheel, a detachable support plate, and a bottom positioning wheel inside the positioning groove. The support plate is easy to maintain, and the bottom positioning wheel reduces feeding friction.

[0012] Furthermore, the positioning mechanism also includes a fixed plate fixed to the bottom surface of the shearing mechanism. An adjusting screw is threadedly connected to one side of the fixed plate, and an adjusting plate is rotatably connected to the threaded end of the adjusting screw. Two support rods are fixed to one side of the adjusting plate, and the support rods are slidably disposed with one side of the fixed plate. The top surface of the support rods is provided with a scale.

[0013] The above technical solution achieves precise calibration of the shearing length by connecting an adjusting screw to one side of the fixed plate, rotating the adjusting plate at the end of the screw, and having graduated support rods on both sides that slide with the fixed plate.

[0014] Furthermore, the shearing mechanism also includes a hydraulic cylinder fixed to the front side of the worktable near the left and right sides. The telescopic end of the hydraulic cylinder is fixed to the bottom surface of the lifting seat, the fixing plate is fixed to the bottom surface of the lifting seat near the front side, and the adjusting plate is close to the cutter.

[0015] The above technical solution uses a hydraulic cylinder on the front side of the workbench to drive the lifting seat, with the cutter fixed to the rear side of the bottom surface of the lifting seat. The fixing plate is located on the front side of the lifting seat and close to the cutter, thus optimizing the shearing coordination.

[0016] Furthermore, a spring is movably sleeved on the outer wall of the pressure shaft, with both ends of the spring abutting against the end of the pressure shaft and the bottom surface of the lifting seat, respectively.

[0017] The above technical solution involves installing springs on the outer wall of the pressure shaft, with both ends abutting against the shaft end and the bottom surface of the lifting seat. The elastic preload force causes the pressure shaft to adhere to the plate and maintain a horizontal state with the directional pressure roller.

[0018] Furthermore, a storage bin is fixed to the front side of the workbench.

[0019] The above technical solution uses a fixed storage bin on the front of the workbench with an opening corresponding to the cutting trajectory of the cutter to automatically collect cutting waste and reduce workshop cleaning procedures.

[0020] The beneficial effects of this utility model are as follows: The dual-point support design of the directional pressure roller and the pressure shaft improves the positioning stability during the metal sheet shearing process. The directional pressure roller pre-presses the front end during the sheet feeding stage, and the pressure shaft of the shearing mechanism presses the middle in real time, forming a coordinated constraint along the feeding direction, which effectively avoids the problem of the front end of the long sheet lifting due to its own weight or thrust.

[0021] Through the mechanical transmission design of the eccentric pressure shaft and the operating lever, rapid lifting and lowering control of the directional pressure roller is achieved. The operator can pre-press the sheet metal with one hand while focusing on pushing the sheet metal to precisely contact the adjusting plate with the other hand, simplifying the complexity of traditional two-handed operation. At the same time, the elastic pre-tensioning structure of the tension spring and spring-loaded spring enables the pressure assembly to adapt to the sheet metal thickness, so as to meet the processing needs of different sheet metal specifications without frequent adjustment of mechanical parameters.

[0022] The rolling support structure of the side positioning wheel and bottom positioning wheel in the positioning mechanism reduces the frictional resistance when feeding the sheet material, avoiding surface scratches. It is suitable for precision machining of easily damaged materials such as stainless steel and aluminum alloy. The cooperation between the adjusting screw and the scale support rod enables rapid calibration of the shearing length, shortening the material change and debugging time. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a shearing machine for metal sheets according to this utility model; Figure 2 This is a three-dimensional disassembled structural diagram of a metal sheet shearing machine according to the present invention; Figure 3 for Figure 2 Enlarged view of the partial three-dimensional structure of A in the middle; Figure 4 This is a three-dimensional structural diagram of the adjusting plate of a metal sheet shearing machine according to this utility model.

[0024] Reference numerals in the attached drawings: 1. Workbench; 2. Drive frame; 201. Eccentric pressure shaft; 202. Pressure rod; 203. Directional pressure roller; 204. Tension spring; 205. Operating lever; 3. Positioning groove; 301. Side positioning wheel; 302. Support plate; 303. Bottom positioning wheel; 4. Fixing plate; 401. Adjusting screw; 402. Adjusting plate; 403. Support rod; 5. Lifting seat; 501. Hydraulic cylinder; 502. Cutter; 503. Pressure shaft; 504. Spring; 6. Storage bin. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] like Figure 1-4 As shown, a metal sheet shearing machine according to this embodiment includes a worktable 1. A positioning mechanism and an auxiliary pressing assembly are provided on the top surface of the worktable 1. A shearing mechanism is also provided on the front side of the worktable 1. The auxiliary pressing assembly includes a drive frame 2 fixed to the top surface of the worktable 1. An eccentric pressing shaft 201 is rotatably connected to the top surface of the drive frame 2. Several pressing rods 202 are slidably inserted into the bottom surface of the drive frame 2. The top end of each pressing rod 202 abuts against the outer wall of the eccentric pressing shaft 201, and a directional pressing roller 203 is rotatably connected to the bottom end of each pressing rod 202. When the eccentric pressing shaft 201 rotates, due to the eccentric structure of the eccentric pressing shaft 201, the pressing rods 202... Applying pressure causes the pressure rod 202 to move downwards, which in turn drives the directional pressure roller 203 to abut against the top surface of the metal sheet. During the feeding stage of the sheet, the front end is pre-pressed. The shearing mechanism includes a lifting seat 5 located on the front side of the worktable 1. Several pressure shafts 503 are slidably inserted into the top surface of the lifting seat 5. A cutter 502 is fixed near the rear side of the bottom surface of the lifting seat 5. When the lifting seat 5 drives the cutter 502 to move downwards, it can shear the pressed and positioned metal sheet. At this time, the pressure shafts 503 press down synchronously to press the middle of the metal sheet in real time. The directional pressure roller 203 and the pressure shaft 503 cooperate to form a double-point support to prevent the sheet from warping.

[0027] A tension spring 204 is fixed between the top surface of the directional pressure roller 203 and the bottom surface of the drive frame 2. The tension spring 204 is movably sleeved on the outer wall of the pressure rod 202. Both ends of the eccentric pressure shaft 201 are fixed with operating rods 205. The top of the directional pressure roller 203 is elastically connected to the drive frame 2 through the tension spring 204. When the eccentric pressure shaft 201 rotates and drives the directional roller 203 to descend, the tension spring 204 adapts to the preload, so that when the eccentric pressure shaft 201 resets, the tension spring 204 quickly rebounds and drives the directional roller 203 to reset, which facilitates the positioning of the next plate. The positioning mechanism includes a positioning groove 3 opened on the top surface of the workbench 1. Several side positioning rollers 301 are rotatably connected to the left and right sides of the inside of the positioning groove 3. A support plate 302 is detachably installed on the bottom surface of the inside of the positioning groove 3 by bolts. The top surface of the support plate 302 is rotatably connected to... The positioning mechanism includes a bottom positioning wheel 303, a side positioning wheel 301, a detachable support plate 302, and a bottom positioning wheel 303, forming a rolling guide structure. The support plate 302 facilitates maintenance, and the bottom positioning wheel 303 reduces feeding friction. The positioning mechanism also includes a fixed plate 4 fixed to the bottom surface of the shearing mechanism. One side of the fixed plate 4 is threadedly connected to an adjusting screw 401, and the threaded end of the adjusting screw 401 is rotatably connected to the adjusting plate 402. Two support rods 403 are fixed to one side of the adjusting plate 402. The support rods 403 are slidably disposed with one side of the fixed plate 4. The top surface of the support rods 403 is marked with a scale. One side of the fixed plate 4 is threadedly connected to the adjusting screw 401, and the end of the screw is rotatably connected to the adjusting plate 402. The marked support rods 403 on both sides slide with the fixed plate 4 to achieve precise calibration of the shearing length.

[0028] The shearing mechanism also includes hydraulic cylinders 501 fixed to the front side of the worktable 1 near the left and right sides. The telescopic ends of the hydraulic cylinders 501 are fixed to the bottom surface of the lifting seat 5. The fixing plate 4 is fixed to the bottom surface of the lifting seat 5 near the front side. The adjusting plate 402 is close to the cutter 502. The hydraulic cylinders 501 on the front side of the worktable 1 drive the lifting seat 5. The cutter 502 is fixed to the rear side of the bottom surface of the lifting seat 5. The fixing plate 4 is located on the front side of the lifting seat 5 and close to the cutter 502 to optimize shearing coordination. The pressure shaft 503... A spring 504 is movably sleeved on the outer wall. The two ends of the spring 504 abut against the end of the pressure shaft 503 and the bottom surface of the lifting seat 5, respectively. The spring 504 is sleeved on the outer wall of the pressure shaft 503, and the two ends abut against the shaft end and the bottom surface of the lifting seat 5. The pressure shaft 503 is pressed against the plate by the elastic pre-tightening force and maintains a horizontal state with the directional pressure roller 203. A storage bin 6 is fixed on the front side of the worktable 1. The storage bin 6 is used to collect the waste material of the cut plate. Its opening direction corresponds to the cutting trajectory of the cutter 502.

[0029] The working principle of this embodiment is as follows: In use, confirm that the workbench 1 is placed horizontally, the positioning mechanism, auxiliary pressing component and shearing mechanism are connected and fastened, check that the storage bin 6 is empty to avoid the accumulation of waste material affecting the material drop after shearing, and according to the thickness of the plate to be sheared and the shearing length requirement, rotate the adjusting screw 401 to push the adjusting plate 402 to move, and calibrate the position through the scale on the top surface of the support rod 403. The metal sheet is pushed into the positioning groove 3 on the top surface of the workbench 1. The two sides of the sheet contact the side positioning wheels 301, and the bottom surface contacts the bottom positioning wheel 303. The rolling friction reduces the feeding resistance and avoids surface scratches. The operating rod 205 of the auxiliary pressing component is operated with one hand to drive the eccentric pressing shaft 201 to rotate. Due to the eccentric structure of the eccentric pressing shaft 201, it applies downward pressure to the pressing rod 202, causing the pressing rod 202 to drive the directional pressing wheel 203 to descend and press the front end of the sheet. At this time, the tension spring 204 adapts to the preload, so that when the eccentric pressing shaft 201 is reset, the tension spring 204 quickly rebounds and drives the directional wheel 203 to reset, which facilitates the positioning of the next sheet. Then, the sheet is pushed forward with one hand until the front end of the sheet abuts against the adjusting plate 402, completing the precise positioning of the cutting length. At this time, the support rod 403 and the fixed plate 4 slide together to ensure that the adjusting plate 402 does not deviate. The hydraulic cylinder 501, which activates the shearing mechanism, drives the lifting seat 5 to descend as a whole. The bottom surface of the pressure shaft 503 first contacts the middle of the sheet metal. The spring 504 is compressed and provides elastic preload, making the pressure shaft 503 tightly fit the surface of the sheet metal. The front end of the directional pressure roller 203 is preloaded and pressed against the middle of the pressure shaft 503, forming a coordinated constraint on the feeding direction of the metal sheet metal, preventing long sheets from tilting due to their own weight or thrust. The lifting seat 5 continues to descend, and the cutter 502 contacts the sheet metal and completes the cutting. The cutter 502 is fixed to the rear side of the bottom surface of the lifting seat 5 and moves synchronously with the pressure shaft 503 to ensure that the sheet metal is not displaced at the moment of cutting. After the cutting is completed, the hydraulic cylinder 501 drives the lifting seat 5 to rise, releases the operating lever 205, and the tension spring 204 quickly rebounds, driving the directional roller 203 to reset. The waste generated by cutting falls into the storage bin 6 along the cutting trajectory of the cutter 502. The finished sheet metal after cutting is taken out, completing a single processing step.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A plate shearing machine for sheet metal, comprising a worktable (1), characterized in that, The top surface of the workbench (1) is provided with a positioning mechanism and an auxiliary pressing assembly, and the front side of the workbench (1) is also provided with a shearing mechanism. The auxiliary pressing assembly includes a drive frame (2) fixed on the top surface of the workbench (1). An eccentric pressing shaft (201) is rotatably connected to the top surface of the drive frame (2). Several pressing rods (202) are slidably inserted into the bottom surface of the drive frame (2). The top end of the pressing rod (202) abuts against the outer wall of the eccentric pressing shaft (201). A directional pressing wheel (203) is rotatably connected to the bottom end of the pressing rod (202). The shearing mechanism includes a lifting seat (5) located on the front side of the workbench (1), a cutter (502) is fixed on the bottom surface of the lifting seat (5) near the rear side, and several pressing shafts (503) are slidably inserted on the top surface of the lifting seat (5).

2. The plate shearing machine for a metal plate according to claim 1, wherein A tension spring (204) is fixed between the top surface of the directional pressure roller (203) and the bottom surface of the drive frame (2). The tension spring (204) is movably sleeved on the outer wall of the pressure rod (202). Both ends of the eccentric pressure shaft (201) are fixed with operating rods (205).

3. The plate shearing machine for a metal plate according to claim 2, wherein The positioning mechanism includes a positioning groove (3) on the top surface of the workbench (1). Several side positioning wheels (301) are rotatably connected to the left and right sides inside the positioning groove (3). A support plate (302) is detachably installed on the bottom surface inside the positioning groove (3) by bolts. A bottom positioning wheel (303) is rotatably connected to the top surface of the support plate (302).

4. The plate shearing machine for sheet metal according to claim 3, wherein The positioning mechanism also includes a fixed plate (4) fixed to the bottom surface of the shearing mechanism. An adjusting screw (401) is threadedly connected to one side of the fixed plate (4). An adjusting plate (402) is rotatably connected to the threaded end of the adjusting screw (401). Two support rods (403) are fixed to one side of the adjusting plate (402). The support rods (403) are slidably disposed with one side of the fixed plate (4). The top surface of the support rods (403) is provided with a scale.

5. The plate shearing machine for sheet metal according to claim 4, wherein The shearing mechanism also includes a hydraulic cylinder (501) fixed on the front side of the workbench (1) near the left and right sides. The telescopic end of the hydraulic cylinder (501) is fixed to the bottom surface of the lifting seat (5). The fixing plate (4) is fixed on the bottom surface of the lifting seat (5) near the front side. The adjusting plate (402) is close to the cutter (502).

6. The plate shearing machine for sheet metal according to claim 5, wherein A spring (504) is movably sleeved on the outer wall of the pressing shaft (503), and the two ends of the spring (504) abut against the end of the pressing shaft (503) and the bottom surface of the lifting seat (5).

7. The metal plate shearing machine according to claim 6, wherein A storage bin (6) is fixed to the front side of the workbench (1).

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